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    Carbon dating artwork

    As mineral layers are deposited, they draw in uranium.

    Because uranium decays into thorium at a known rate, the ratio of uranium to thorium isotopes in a sample indicates how old it is.

    , undermine a Eurocentric view of the origins of human creativity and could prompt a ‘gold rush’ to find even older art on the route of human migration from Africa to the east.

    Our Canadian Art and Antiques appraisers, authentication experts and valuers are available to assist either on line or by private appointment, with the authentication of paintings from all eras including; Old masters, landscapes, marine and still life paintings, religious subjects, icons, portraits, pictures and prints and from all eras including 15th century, XV, 16th century, XVI, 17th century, XVI, 18th century, XVIII, 19th century, IXX and 20th century, XX.

    The influential American art patron Peggy Guggenheim bought the painting, believing it to be part of Léger's "Contraste de Formes" (Contrasts of Forms), an abstract series created between 19 that breaks up figures into schematic units.

    (Léger was a contemporary of Pablo Picasso.) In the 1970s, Léger scholar Douglas Cooper voiced serious skepticism about its authenticity. Guggenheim Foundation, the current steward of the painting, has never exhibited nor catalogued the artwork.

    The dates have been a matter of dispute but a study published in 2012 supports placing the art in the Aurignacian period, approximately 32,000–30,000 years BP.

    A study published in 2016 using additional 88 radiocarbon dates showed two periods of habitation, one 37,000 to 33,500 years ago and the second from 31,000 to 28,000 years ago with most of the black drawings dating to the earlier period.

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